Saturday, September 5, 2009

Counting Patterns

The recent student sheets from our Math Investigation Unit, Building on Numbers You Know, that we have been working on in class are designed to stimulate thinking about counting patterns. Often, students fall back on methods of solving these questions that are far from efficient. For example, a student might simply list all of the multiples of 25 in order to get to 300 and then state, after counting the written numbers, that it takes 12 people counting by 25 to get to 300. However, many students quickly latch onto the idea that it is much easier just to figure out how many 25s are in 100 and then triple the amount to get to 300.

On the "What's in Between" page, students have to sort through a multitude of important concepts in order to find the answers to these puzzles. See if you can find the puzzle with answers that are not quite correct.

2 comments:

Anonymous said...

Wow! This is super complex mathematical thinking going on in 5th grade! It was not like that when I was in 5th grade. These kids ROCK!

Sherrie Rabe said...

I am glad YOU think so. I borrow your cd player, your ideas and now your words. It is because I admire you soooo very much. I hope you don't mind. :)